Angles

Don’t bet when the going changes. If the going changes from firm to soft, keep your money in your pocket. Nothing upsets form more than a major change in ground conditions.
Follow up-and-coming jockeys. Look out for promising apprentices.

Don’t chase your losses. There’s always another day.
Don’t bet heavily when there’s been a sudden change in the track condition.
Don’t back out of form trainers or jockeys
One vital ingredient for successful punting is that you’ve got to be confident that your selection can win. Horses with good recent form, preferably winning form, running against limited opposition within their class, when at their peak, progressing or improving, do win most races, all year round.
“They are a constant source of winners for anyone to exploit. Almost every winner worth backing falls into this category which is broadened even further by the four pros: PROVEN, PROGRESSIVE, PROMISING and PROFITABLE.”
It is sufficient to be a master of one game rather than try to learn two or three, as long as you retire to the side lines when the game you know is no longer being played.” The same principal applies in gambling.
Get an EDGE & stick to using it. What is your edge. What do I know that gives me advantage over others. Have a game plan & stick to it.
On a bad run take a break & get away from racing for at least a week.
Each way - an admission that dont really expect to win.

In exchange betting 75% of the volume is in the last 5 minutes B4 the off spread pretty evenly but at highest 1-2 mins b4 off.